RCE in Achat Software Chat Server
CVE-2025-34127
A stack-based buffer overflow exists in Achat v0.150 in its default configuration. By sending a specially crafted message to the UDP port 9256, an attacker can overwrite the structured exception handler (SEH) due to insufficient bounds checking on user-supplied input leading to remote code execution.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
EPSS exploit prediction
EPSS: 0.016 (75.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 75.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.016 · change: +0.005
Affected products
- Achat Software Chat Server — versions 0.150
Weakness classification (CWE)
Public proof-of-concept exploits
References
- raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exploits/w… (exploit)
- www.vulncheck.com/advisories/achat-seh-buffer-overflow (third-party-advisory)
- www.exploit-db.com/exploits/36056 (exploit)
Frequently asked questions
- What is CVE-2025-34127?
- CVE-2025-34127 is a vulnerability in Achat Software Chat Server, classified under Code Injection. Published 2025-07-16.
- Is CVE-2025-34127 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.